Ball-bearing caster.



B. C. WODWARD & H. E. SGAFF.

yBALL BEARING GASTER. APPLICATION FILED 00127, 1908.

908, 188, Patented Dec. 29, 1908.

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SEN!

BENJMIN CLEM'NT WOODWARD AD TEbNESSEE.

HEKRY EDWARD SCA F, OF NASHVILLE,

BALL- BEARING cAs'rEn.

une. 908,188.

Specification oi Letters Patent.

Patented Dec. 29, 1908.

"Application siedcctober 7, 190e. serial No. 456,537.

To all whom it may concern:

13e it known that we, BENJAMI'N CLEMENT WOODWARD' and AHnxrir EDWARD SCAFF, 'citizens of the United States, residing at Nashville, in the county of Davidson and State of Tennessee,have invented certain new and useful improvements in Ball-Bearing Casters, of which the following is a. specifi- 'Th-is invention relates to ball bearing casters, and has tor its obiect to provide' a casterv improved particularly With respect to the manner 1n and means by which the balls are` supported, the device including' a large ball Withanti-friction balls at the to `thereof which support the Weight, and bals at the-side-thereol which support the lateral The device is s o constructed that lit Will -rollieasily in any direction Without dragging, and 1t can be qulckly and readily assembled or taken apart. This latter feature is advantageous in case of the' breakage of any of inFigS. i i Referring specifically to the drawings, '6 indicates an outer-cylindrical. shell or cas..

' 4ing Whi'chdits at a snug iit overt-heV side The main or large ball 15 is mounted'in the Fie'.` 3 is a side elevation of a 'modilication adapted for trunks and the like; Fig. e 1s. a

central verticalsection ot the device shown- -Walls' of a cup 7 which is reduced at the'to n to form a .shoulder 8. 'T he spindle '9., is

riveted at its lower end to the top of this cup,

vso kthat the cup will turn ivi'th the spindle, the cup 'resting asainsta shoulder 10 on the spindle Which rests upon the top 'of the shoulder 10, land this disk has recesses 12 therein formed .by tongues 13 struck up on opposite sides of the spindle. A spriii;r 1d is mounted upon the spindle, with the reduced ends 15 of its branches fitting` in the slots 12, and this spring is held on the spindle by a Cotter 16 l at the top. The spring serves to lit in the socket in the article to which thecaster is applied and to hold the caster 1n place.

cup, resting against a rngcf balls 16 which5 The spindle has thereon a disk ,11.

1 roll or turn in the corner of the cup. The

supportthe bal at the sides and hold the vba l in the cup, the shell having an annular flange 18 at its lower edge upon which the balls 17 rest. The shell is held in place on the cup by means of 'clips 19 produced at the upper edge thereof which when the parts are assembled are struck in over the shoulder 8. To remove the shell and the balls it is necessary simplyto pry out the tongues 19 with a screw driver or similar implement and pull oit' the shell 6.

In the modiiication shown in Figs. 3 and 4, instead of the long spindle 9, a short spindle 9a is used projecting from the lower angle of a 'corner bracketQO which is ada ted to it upon .the corner of a trunk or the like.

same as above described;

All the parts can be readily produced', the spindle being cast or turned and the-shell, cup, spring, bracket, and disk, being stamped out of sheet metal. The invention, however, is not limited to any particular manner ofproducing the parts, nor is it limited to modifications may be made Within the scope thereof.

ing, but the ball 15 is freely movable in all articles Without dragging or binding.

.' We claim:

A caster comprising a spindle, an inverted rotatable cup mounted on the spindle and and having an inwardly projecting liange at the lower end, a ball Within the cup and shell, a ring oi' anti-friction balls in the corner between said ball and the top and sides of the cup, and a ring of antifric tion balls beta/'een the side ofthe ball andv the shell and resting on said lange.

In testimony whereof, We athu our signa tures in presence of two Witnesses.

BENJAMH@ CLEMNT WOODWARD. HENRY EDWARD SCAFF.

Wi i tu esscs: J. L. Rrcnaaoson, il? D. `Nrcrroils The structure of the casing and` balls is the.

the exactv structure shown, since various With the forms 'shown in Figs. 1 and 2 the spindle, if necessary, will turn with the cas' directions and will carry even very heavy.

having cylindrical sides, a shell lfitting on the outside orp the cup and rotatable therewith shell 6 also supports a ring of balls 17 Which 

